Paniolo Steak with Wicked Wahine Chimichurri

Name: Paniolo Steak with Wicked Wahine Chimichurri
Ingredients: 2 (1 to 1 1/2 pound) flat iron steaks (beef chuck top blade); Olive oil, for brushing steaks; Salt and freshly ground black pepper; 1 bunch cilantro, tough stems removed, coarsely chopped (about 1 cup); 1 bunch Italian parsley, tough stems removed, coarsely chopped (about 1 cup); 4 cloves garlic, coarsely chopped; 2 tablespoons fresh ginger root, peeled and coarsely chopped; 4 green onions (root tips and tough green ends removed) coarsely chopped; 4 tablespoons rice wine vinegar; 3 tablespoons fresh squeezed lime juice; 3 tablespoons sesame oil; 1/2 to 3/4 cup vegetable oil; 3 tablespoons pineapple juice; 1 teaspoons Asian hot chili sauce (use 2 if you like it spicy!); Salt; For garnish: 2 tablespoons toasted sesame seeds and a few pineapple rings (use good quality canned), if desired.